A micro-expandable hinge mechanism and spacecraft

Abstract

The present application relates to the technical field of hinges for spacecraft, and in particular to a micro-deployable hinge mechanism and a spacecraft. The hinge mechanism includes a fixed hinge, a movable hinge assembly, a torsion spring and an anti-rebound assembly; the movable hinge assembly is connected to the fixed hinge by a torsion spring, and the torsion spring can make the movable hinge assembly rotate relative to the fixed hinge; the movable hinge assembly includes a first movable hinge; the first movable hinge is inserted on the fixed hinge, and the two end faces of the second arc-shaped boss of the first movable hinge can respectively abut or separate from the two end faces of the first arc-shaped boss on the fixed hinge; the anti-rebound assembly includes a spring leaf arranged on the fixed hinge; when the first movable hinge is in the first state, the spring leaf abuts against the outer surface of the second arc-shaped boss; when the first movable hinge rotates to the second state, the side edge of the spring leaf abuts against one end face of the second arc-shaped boss, and can prevent the first movable hinge from rotating in the opposite direction. The hinge mechanism has a compact structure and is easy to disassemble and assemble. It can be unfolded under the action of elastic potential energy and locked in a set position.

Description

Technical Field

[0001] The present application relates to the technical field of hinges for spacecraft, and in particular to a micro-deployable hinge mechanism and a spacecraft. Background Art

[0002] As a commonly used connection mechanism in spacecraft mechanisms, the hinge mechanism can realize the folding, unfolding, locking or shape retention between spacecraft components. It is an indispensable and crucial component in aerospace, and determines whether the spacecraft can ultimately reach the required working state or working position.

[0003] The most commonly used hinges in spacecraft are passive deployment hinges, which usually use screws and mounting flanges to directly connect to the spacecraft platform and solar panels or other deployment equipment. The mechanical interface is simple and the hinge has a deployment locking function.

[0004] Hinges used in lightweight spacecraft such as micro-satellites and in narrow spaces need to have a compact structure, be lightweight, have flexible and reliable connections, be able to withstand complex loads and maintain stability, and also be able to achieve rapid disassembly and assembly of the structure to improve maintenance and overhaul efficiency. However, it is difficult for existing hinges to meet the above technical requirements at the same time. Summary of the invention

[0005] The present application provides a miniature unfolding hinge mechanism and a spacecraft, which are mainly aimed at the use requirements of lightweight spacecraft such as micro-satellites and narrow spaces. It has a compact structure, occupies a small space, is easy to disassemble and assemble, and can be unfolded under the action of elastic potential energy and locked in a set position.

[0006] In a first aspect, the present application provides a micro-deployment hinge mechanism, including a fixed hinge, a movable hinge assembly, a torsion spring, and an anti-rebound assembly;

[0007] The fixed hinge comprises a first mounting portion and an arched cylinder, a first circular hole is arranged at one end of the arched cylinder, a first arc-shaped boss is extended at the outer edge of the first circular hole, and a square hole is arranged at one side of the first circular hole;

[0008] The movable hinge assembly is connected to the fixed hinge via a torsion spring, and the torsion spring can enable the movable hinge assembly to rotate relative to the fixed hinge along a first direction;

[0009] The movable hinge assembly includes a first movable hinge; the first movable hinge includes a second mounting portion and a first cylindrical rod, and a second arc-shaped boss is arranged outside the first cylindrical rod; the first cylindrical rod is inserted into the first circular hole, and the two end surfaces of the second arc-shaped boss can respectively abut or separate from the two end surfaces of the first arc-shaped boss;

[0010] The anti-rebound component includes a reed inserted in the square hole, and the outer end of the reed extends out of the square hole;

[0011] When the first movable hinge is in a first state, the spring sheet abuts against the outer surface of the second arc-shaped boss; when the first movable hinge rotates in the opposite direction of the first direction to the second state, the side edge of the spring sheet abuts against an end surface of the second arc-shaped boss and can prevent the first movable hinge from rotating in the first direction.

[0012] In a preferred embodiment, a second circular hole is provided at the other end of the arched cylinder, and the movable hinge assembly further comprises a second movable hinge;

[0013] The second movable hinge includes a third mounting portion and a second cylindrical rod, the torsion spring is sleeved on the second cylindrical rod, and two ends of the torsion spring are respectively connected to the first mounting portion and the third mounting portion; the second cylindrical rod is inserted into the second circular hole.

[0014] In a preferred embodiment, the first arc-shaped boss has a first defined end surface and a second defined end surface, and the second arc-shaped boss has a third defined end surface and a fourth defined end surface;

[0015] When the second movable hinge is in the first state, the second defined end surface of the first arc-shaped boss abuts against the fourth defined end surface of the second arc-shaped boss;

[0016] When the second movable hinge is in the second state, the first defined end surface of the first arc-shaped boss abuts against the third defined end surface of the second arc-shaped boss.

[0017] In a preferred embodiment, the sum of the circumferential angle of the first arc-shaped boss and the circumferential angle of the second arc-shaped boss is 180° to 280°.

[0018] In a preferred embodiment, the sum of the circumferential angle of the first arc-shaped boss and the circumferential angle of the second arc-shaped boss is 270°.

[0019] In a preferred embodiment, from the third defined end surface to the fourth defined end surface, the distance from the outer surface of the second arc-shaped boss to the central axis of the first cylindrical rod gradually increases;

[0020] The spring sheet is a long thin steel sheet, and can be elastically deformed along the thickness direction in the square hole under the extrusion of the second arc-shaped boss.

[0021] In a preferred embodiment, the inner end of the spring leaf is fixedly disposed on a surface of the square hole close to the first circular hole.

[0022] In a preferred embodiment, the second cylindrical rod includes two sections, a large diameter cylinder and a small diameter cylinder, the small diameter cylinder is used to be inserted into the second circular hole, and the torsion spring is sleeved on the outer surface of the large diameter cylinder.

[0023] In a preferred embodiment, a first boss is provided on the fixed hinge, and a second boss is provided on the second movable hinge; and both ends of the torsion spring are respectively connected to the first boss and the second boss.

[0024] In a second aspect, the present application further provides a spacecraft, including a spacecraft platform and a device to be deployed, wherein the spacecraft platform and the device to be deployed are connected via the micro-deployment hinge mechanism.

[0025] This application has the following beneficial effects:

[0026] The hinge mechanism provided in the present application also occupies a relatively small space when installed, without increasing the device envelope size too much; the disassembly and assembly operations are simple, and the unfolding is driven by the release of potential energy by the torsion spring. After being unfolded into place, two-way limiting is achieved by the abutment of two arc-shaped bosses and the anti-rebound component, thereby ensuring the stable working state of the equipment; when the hinge mechanism needs to be restored to the folded state, the rebound limit can be released by flicking the spring leaf, so that the hinge mechanism can be folded; the entire hinge mechanism has greater rigidity, which improves the ability of the hinge mechanism to withstand complex loads and maintain stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 An overall axonometric diagram of the hinge mechanism provided in an embodiment of the present application;

[0029] Figure 2 An exploded schematic diagram of a hinge mechanism provided in an embodiment of the present application;

[0030] Figure 3 It is a first-person perspective schematic diagram of the fixed hinge;

[0031] Figure 4 It is a schematic diagram of a longitudinal section of a fixed-hinged arched cylinder;

[0032] Figure 5 It is a second perspective schematic diagram of the fixed hinge;

[0033] Figure 6 It is a third-view schematic diagram of the fixed hinge;

[0034] Figure 7 is a schematic diagram of the first movable hinge;

[0035] Figure 8 is a schematic diagram of the second movable hinge from a first perspective;

[0036] Fig. 9 is a schematic diagram of the second movable hinge from a second viewing angle;

[0037] Fig.10 A schematic longitudinal section diagram of a hinge mechanism provided in an embodiment of the present application;

[0038] Fig.11 A schematic diagram of a hinge mechanism provided in an embodiment of the present application in a folded state;

[0039] Fig.12 A schematic diagram of a hinge mechanism provided in an embodiment of the present application in an unfolded state;

[0040] Fig.13 is a schematic diagram of the end face of the hinge mechanism in a folded state;

[0041] Fig.14 is a schematic diagram of the end face of the hinge mechanism during the unfolding process;

[0042] Fig.15 is a schematic end view of the hinge mechanism in an unfolded state;

[0043] Fig.16 It is a schematic diagram of the folded state when the spacecraft platform and the equipment to be deployed are connected by two pairs of hinge mechanisms;

[0044] Fig.17 This is a schematic diagram of the unfolded state when the spacecraft platform and the equipment to be unfolded are connected by two pairs of hinge mechanisms.

[0045] Numbers in the figure:

[0046] 1-fixed hinge; 11-counterbore; 12-first boss; 13-arched cylinder; 131-first circular hole; 132-first arc-shaped boss; 1321-first limiting end face; 1322-second limiting end face; 133-second circular hole; 14-square hole; 141-third threaded hole; 142-square groove;

[0047] 2-movable hinge assembly; 21-second movable hinge; 211-second threaded hole; 212-second inner hexagonal groove; 213-second boss; 214-large diameter cylinder; 215-small diameter cylinder; 22-first movable hinge; 221-first threaded hole; 222-first inner hexagonal groove; 223-second arc-shaped boss; 2231-third limiting end face; 2232-fourth limiting end face; 224-first cylinder;

[0048] 3-torsion spring;

[0049] 4-anti-rebound component; 41-reed; 42-fastening screw. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and marked in the drawings can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0054] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0057] The hinge mechanism mainly includes a fixed hinge, a movable hinge assembly, a torsion spring and an anti-rebound assembly.

[0058] The fixed hinge comprises a first mounting portion and an arched cylinder, a first circular hole is arranged at one end of the arched cylinder, a first arc-shaped boss is extended at the outer edge of the first circular hole, and a square hole is arranged at one side of the first circular hole;

[0059] The movable hinge assembly is connected to the fixed hinge via a torsion spring, and the torsion spring can enable the movable hinge assembly to rotate relative to the fixed hinge along a first direction;

[0060] The movable hinge assembly includes a first movable hinge; the first movable hinge includes a second mounting portion and a first cylindrical rod, and a second arc-shaped boss is arranged outside the first cylindrical rod; the first cylindrical rod is inserted into the first circular hole, and the two end surfaces of the second arc-shaped boss can respectively abut or separate from the two end surfaces of the first arc-shaped boss;

[0061] The anti-rebound component includes a reed inserted in the square hole, and the outer end of the reed extends out of the square hole;

[0062] When the first movable hinge is in a first state, the spring sheet abuts against the outer surface of the second arc-shaped boss; when the first movable hinge rotates in the opposite direction of the first direction to the second state, the side edge of the spring sheet abuts against an end surface of the second arc-shaped boss and can prevent the first movable hinge from rotating in the first direction.

[0063] The torsion spring may be directly arranged outside the first cylindrical rod, for example, a cavity for accommodating the torsion spring is arranged between the first arc-shaped boss and the second arc-shaped boss.

[0064] In this solution, the movable hinge assembly only includes one movable hinge, which can also achieve the corresponding functions, but the stability is slightly worse. A more preferred embodiment is described in detail below.

[0065] like Figure 1 and Figure 2 As shown, the hinge mechanism in this embodiment mainly includes a fixed hinge 1, a movable hinge assembly 2, a torsion spring 3 and an anti-rebound assembly 4.

[0066] The structure of fixed hinge 1 is as follows Figures 3 to 6 Specifically, the lower surface of the fixed hinge 1 is used to contact the spacecraft platform, and two countersunk holes 11 are set on one side of the fixed hinge 1, which is installed with the spacecraft platform by screws. An arched cylinder 13 is left on the other side of the fixed hinge 1, and the upper surface of the arched cylinder 13 is semicircular, with a first circular hole 131 and a second circular hole 133 concentric with the upper surface left at both ends.

[0067] A square hole 14 is provided on one side of the bottom of the arched cylinder 13 near the first circular hole 131, and a third threaded hole 141 is provided near the center of the arched cylinder 13 for installing a fastening screw 42. The square hole 14 is a rectangular hole near the edge of the fixed hinge 1 for constraining and limiting the spring leaf 41; a square groove 142 is also provided on the bottom surface of the fixed hinge 1 at a position corresponding to the square hole 14, which can expose the inner end of the spring leaf 41 for easy installation.

[0068] The hole wall of the first circular hole 131 extends outward to form a first arc-shaped boss 132 , and the first arc-shaped boss 132 has a first limiting end face 1321 and a second limiting end face 1322 , and the two end faces are respectively used to limit the movable hinge assembly 2 in the expanded state (90 degrees) and the retracted state (0 degrees).

[0069] A first boss 12 is further provided on a side of the surface of the fixed hinge 1 close to the second circular hole 133 , and a connecting hole for connecting the torsion spring 3 is provided on the first boss 12 .

[0070] The movable hinge assembly 2 comprises a first movable hinge 22 and a second movable hinge 21 . The second movable hinge 21 and the first movable hinge 22 are located at two ends of the fixed hinge 1 and can rotate after being connected and matched with the fixed hinge 1 .

[0071] The structure of the second movable hinge 21 is as follows Figure 7 As shown, one end of the second movable hinge 21 is an arched cylinder, and the flat side of the arched cylinder is a mounting surface connected to the device to be deployed. Two second threaded holes 211 are arranged on the arched cylinder, which can be screwed to the device to be deployed by bolts; the outer end surface of the arched cylinder has a second internal hexagonal groove 212, which can be operated with an external hexagonal tool.

[0072] A second boss 213 is left inside the arched cylinder of the second movable hinge 21, and a circular through hole is left inside the second boss 213 for installing the torsion spring 3. The other end of the second movable hinge 21 is a stepped cylinder, and the diameter of the large diameter cylinder 214 in the middle is slightly smaller than the inner diameter of the torsion spring 3, which can pass through the torsion spring 3 and is used to maintain the shape of the torsion spring 3; the small diameter cylinder 215 at the end cooperates with the second circular hole 133 of the fixed hinge 1, so that the second movable hinge 21 can only rotate in the second circular hole 133 of the fixed hinge 1. The torsion spring 3 is sleeved on the large diameter cylinder 214, and the two ends are respectively inserted into the first boss 12 and the second boss 213. When released, it can drive the second movable hinge 21 to rotate.

[0073] The structure of the first movable hinge 22 is as follows Figure 8 and Fig. 9 As shown. One end of the first movable hinge 22 is an arched cylinder, and the plane side of the arched cylinder is a mounting surface connected to the device to be deployed. Two first threaded holes 221 are provided on the arched cylinder, which can be screwed to the device to be deployed by bolts. The outer end surface of the arched cylinder has a first hexagonal recessed groove 222, which can be operated with an external hexagonal tool.

[0074] The other end of the first movable hinge 22 is a first cylinder 224, which can cooperate with the first circular hole 131 of the fixed hinge 1, so that the first movable hinge 22 can only rotate in the first circular hole 131 of the fixed hinge 1. Since the second movable hinge 21 and the first movable hinge 22 are installed on the same device to be deployed, the movement of the second movable hinge 21 and the first movable hinge 22 remains consistent and synchronous.

[0075] A second arc-shaped boss 223 is left on the inner end face of the arched cylinder of the first movable hinge 22. The second arc-shaped boss 223 is designed so that one end face is a third limit end face 2231, which is used to connect with the first limit end face 1321 of the fixed hinge 1 when in the expanded state (90 degrees) to limit the movable hinge assembly 2 from continuing to expand; the other end face is a fourth limit end face 2232, which is in the retracted state (0 degrees) and abuts against the second limit end face 1322 of the fixed hinge 1 to limit the movable hinge assembly 2 from continuing to retract.

[0076] The anti-rebound component 4 includes a spring 41 and a fastening screw 42. The spring 41 is a long thin steel sheet with good elastic deformation characteristics along the thickness direction, large rigidity along the length and width direction, and a certain ability to resist deformation. The spring 41 is fixed to the lower part of the fixed hinge 1 by the fastening screw 42, wherein the outer end of the spring 41 passes through the square hole 14. The outer end of the spring 41 can be deformed in the square hole 14 in the thickness direction under the action of external force, and the spring 41 returns to its original state after the external force disappears.

[0077] From the third limiting end face 2231 to the fourth limiting end face 2232, the distance from the outer surface of the second arc-shaped boss 223 to the central axis of the first cylinder 224 gradually increases; therefore, when the first movable hinge 22 rotates, the second arc-shaped boss 223 can squeeze the spring leaf 41, causing it to undergo elastic deformation in the thickness direction.

[0078] Fig.10 From the longitudinal cross-sectional schematic diagram of the hinge mechanism provided in the embodiment of the present application, it can be seen that the large-diameter cylinder 214 of the second movable hinge 21 passes through the inner ring of the torsion spring 3, and the small-diameter cylinder 215 of the second movable hinge 21 cooperates with the second circular hole 133 at one end of the fixed hinge 1; the other end of the first movable hinge 22 is the first cylinder 224 which cooperates with the first circular hole 131 at the other end of the fixed hinge 1; the second movable hinge 21 and the first movable hinge 22 are connected to the same device to be deployed through the second threaded hole 211 and the first threaded hole 221, so the movement of the second movable hinge 21 and the first movable hinge 22 remains consistent and synchronized.

[0079] The spring 41 is fixed in the third threaded hole 141 in the middle of the fixed hinge 1 by a fastening screw 42, wherein the outer end of the spring 41 passes through the square hole 14 at the lower part of the fixed hinge 1, and the outer end of the spring 41 can be deformed in the square hole 14 in the thickness direction under the extrusion of the second arc-shaped boss 223, and the spring 41 returns to its original state after the extrusion force of the second arc-shaped boss 223 disappears. The cooperation between the fixed hinge 1 and the second movable hinge 21 and the first movable hinge 22 increases the rigidity of the entire hinge mechanism and improves the ability of the hinge to withstand complex loads and maintain stability.

[0080] Figures 11 to 15 Schematic diagrams of various viewing angles of the hinge mechanism during the process from the folded state to the unfolded state are given. In the folded state (0 degrees), the fourth limiting end surface 2232 of the second arc-shaped boss 223 on the first movable hinge 22 contacts and cooperates with the second limiting end surface 1322 of the fixed hinge 1, limiting the movable hinge assembly 2 from further folding. In this state, there is a small gap between the fourth limiting end surface 2232 and the spring leaf 41, and the spring leaf 41 is not deformed;

[0081] During the unfolding process of the movable hinge assembly 2 (0 degrees to 90 degrees), the fourth limiting end face 2232 of the second arc-shaped boss 223 on the first movable hinge 22 begins to contact with the spring leaf 41 and exerts a downward force thereon after the first movable hinge 22 rotates more than a certain angle, causing the spring leaf 41 to deform downward along the thickness direction; in the unfolded state (90 degrees), that is, when the first movable hinge 22 rotates 90 degrees, the third limiting end face 2231 of the second arc-shaped boss 223 on the first movable hinge 22 contacts and cooperates with the first limiting end face 1321 of the fixed hinge 1, restricting the movable hinge assembly 2 from continuing to unfold, and at the same time, the fourth limiting end face 2232 of the second arc-shaped boss 223 on the first movable hinge 22 just breaks away from contact with the spring leaf 41, and the spring leaf 41 returns to its initial state and presses against the fourth limiting end face 2232. Since the spring leaf 41 has greater rigidity along the length and width directions and has a certain ability to resist deformation, it can effectively prevent the first movable hinge 22 from rebounding, and the two limiting end surfaces of the second arc-shaped boss 223 have the effect of bidirectional limiting locking in the expanded state (90 degrees).

[0082] When the hinge mechanism needs to be restored to the folded state, it only needs to move the spring leaf 41 to deform it downward along the thickness direction to release the limiting effect on the fourth limiting end surface 2232, so that the hinge mechanism can be restored to the folded state under the action of the torsion spring 3.

[0083] The spring leaf 41 can be moved manually or by a mechanical linkage mechanism. For example, the lower surface of the outer end of the spring leaf 41 is connected to a driving wheel through a pull rope or a pull rod. When the driving wheel rotates, the spring leaf 41 can be driven downward, thereby releasing the limiting effect on the fourth limiting end surface 2232.

[0084] In other embodiments, the circumferential angle of the first arc-shaped boss 132 and the circumferential angle of the second arc-shaped boss 223 can be adjusted according to design requirements, so that the hinge mechanism has a smaller or larger expansion angle. For example, the circumferential angle of the first arc-shaped boss 132 and the circumferential angle of the second arc-shaped boss 223 are added to 180°, so that the hinge mechanism can be flattened 180°.

[0085] The hinge mechanism provided in the present application also occupies a relatively small space when installed, without increasing the device envelope size too much; the disassembly and assembly operations are simple, and the unfolding is driven by the release of potential energy by the torsion spring. After being unfolded into place, two-way limiting is achieved by the abutment of two arc-shaped bosses and the anti-rebound component, thereby ensuring the stable working state of the equipment; when the hinge mechanism needs to be restored to the folded state, the rebound limit can be released by flicking the spring leaf, so that the hinge mechanism can be folded; the entire hinge mechanism has greater rigidity, which improves the ability of the hinge mechanism to withstand complex loads and maintain stability.

[0086] Fig.16 and Fig.17The schematic diagram shows the folded state and the unfolded state when the spacecraft platform and the equipment to be unfolded are connected by two pairs of hinge mechanisms. The spacecraft platform and the equipment to be unfolded are connected by two micro unfolding hinge mechanisms to achieve stable unfolding and folding.

[0087] The spacecraft adopts the hinge mechanism described above and also possesses various advantages of the hinge mechanism, which will not be described in detail here.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-deployable hinge mechanism, characterized in that: It includes a fixed hinge, a movable hinge assembly, a torsion spring and an anti-rebound assembly; The fixed hinge comprises a first mounting portion and an arched cylinder, a first circular hole is arranged at one end of the arched cylinder, a first arc-shaped boss is extended and arranged on the outer edge of the first circular hole, and the first arc-shaped boss has a first defined end face and a second defined end face; a square hole is arranged on one side of the first circular hole; The movable hinge assembly is connected to the fixed hinge via a torsion spring, and the torsion spring enables the movable hinge assembly to rotate relative to the fixed hinge along a first direction; The movable hinge assembly includes a first movable hinge; the first movable hinge includes a second mounting portion and a first cylindrical rod, and a second arc-shaped boss is arranged outside the first cylindrical rod, the second arc-shaped boss has a third defined end face and a fourth defined end face; from the third defined end face to the fourth defined end face, the distance from the outer surface of the second arc-shaped boss to the central axis of the first cylindrical rod gradually increases; the first cylindrical rod is inserted into the first circular hole, and the two end faces of the second arc-shaped boss can respectively abut or separate from the two end faces of the first arc-shaped boss; The anti-rebound component comprises a spring sheet inserted in the square hole, the outer end of the spring sheet protruding from the square hole; the spring sheet is a long steel sheet, and can be elastically deformed in the thickness direction of the square hole under the pressure of the second arc-shaped boss; When the first movable hinge is in the first state, the second defined end surface of the first arc-shaped boss abuts against the fourth defined end surface of the second arc-shaped boss, and the spring sheet abuts against the outer surface of the second arc-shaped boss; when the first movable hinge rotates in the opposite direction of the first direction to the second state, the first defined end surface of the first arc-shaped boss abuts against the third defined end surface of the second arc-shaped boss, and the side edge of the spring sheet abuts against one end surface of the second arc-shaped boss, and can prevent the first movable hinge from rotating in the first direction; The sum of the circumferential angle of the first arc-shaped boss and the circumferential angle of the second arc-shaped boss is 180°~280°.

2. The micro-deployment hinge mechanism according to claim 1, characterized in that: A second circular hole is provided at the other end of the arched cylinder, and the movable hinge assembly further comprises a second movable hinge; The second movable hinge includes a third mounting portion and a second cylindrical rod, the torsion spring is sleeved on the second cylindrical rod, and two ends of the torsion spring are respectively connected to the first mounting portion and the third mounting portion; the second cylindrical rod is inserted into the second circular hole.

3. The micro-deployment hinge mechanism according to claim 1, characterized in that: The sum of the circumferential angle of the first arc-shaped boss and the circumferential angle of the second arc-shaped boss is 270°.

4. The micro-deployment hinge mechanism according to claim 1, characterized in that: The inner end of the spring sheet is fixedly arranged on the surface of the square hole close to the first circular hole.

5. The micro-deployment hinge mechanism according to claim 2, characterized in that: The second cylindrical rod comprises two sections, a large diameter cylinder and a small diameter cylinder. The small diameter cylinder is used to be inserted into the second circular hole, and the torsion spring is sleeved on the outer surface of the large diameter cylinder.

6. The micro-deployment hinge mechanism according to claim 2, characterized in that: A first boss is arranged on the fixed hinge, and a second boss is arranged on the second movable hinge; and two ends of the torsion spring are respectively connected to the first boss and the second boss.

7. A spacecraft, characterized in that: It comprises a spacecraft platform and a device to be deployed, wherein the spacecraft platform and the device to be deployed are connected via at least one micro-deployment hinge mechanism according to any one of claims 1 to 6.

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